The issue is that on Service Portal, the reference variable list is sorted by the "Name" column rather then the "Order" column even if the table is sorted by Order field.
The reference list in Service Portal can be configured to be sorted by Order column using the following steps:
- Navigate to the reference variable.
- Go to the Default Value tab.
- In the Variable Attributes field, add the following: ref_ac_order_by=order
- Save and test on Service Portal.